Gesomyrmex germanicus is an extinct species of ant in the subfamily Formicinae known from an Eocene fossil found in Europe.

The area is a preserved maar lake which initially formed approximately 47 million years ago as the result of volcanic explosions.

The insects were first studied by German entomologists Gennady Dlussky, Torsten Wappler and Sonja Wedmann, with their 2009 type description of the new species being published in the electronic journal Zootaxa.

[1] The Gesomyrmex germanicus specimens are partially preserved queen caste adults which are fossilized with their dorsal side facing upwards and the attached wings folded along their back.

The antennae are slender in appearance, composed of a scape which extends to the middle of the eye and an undetermined number of funicular segments.